Errors in launching the conversation mode

[dennisgu]

Hi all,
is there any one ever met this issue with output as below, to run gui.py and, in conversation mode:

python2.7 /root/src/git-repos/asr/speaker-recognition/src/gui/gui.py
No module named bob
Warning: failed to import Bob, will use a slower version of MFCC instead.
Warning: failed to import fast-gmm, use gmm from scikit-learn instead
avatar/ltz.jpg ltz
avatar/zxy.jpg zxy
avatar/doubao.jpg doubao
avatar/wyx.jpg wyx
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock
Traceback (most recent call last):
File "/root/src/git-repos/asr/speaker-recognition/src/gui/gui.py", line 188, in do_conversation
signal = self.backend.filter(Main.FS, signal)
File "/root/src/git-repos/asr/speaker-recognition/src/gui/interface.py", line 47, in filter
ret, intervals = self.vad.filter(fs, signal)
File "/root/src/git-repos/asr/speaker-recognition/src/gui/filters/VAD.py", line 29, in filter
raise "NoiseFilter Not Initialized"
TypeError: exceptions must be old-style classes or derived from BaseException, not str

exceptions must be old-style classes or derived from BaseException, not str
None label to show

someone who could help me?
thanks in advance.

system configuration:
Ubuntu 16.04, python 2.7 (debugged in PyCharm Community v2017.2.4)
i7 7700K, 16GB
audio: USB headset with mic built in.